Hoyer HMA4 User manual

Electric Motors
Motor Manual

2
Motor
Manual
Contents
1 Notice.......................................3
1.1 General information ..........................3
1.2 Safety instructions............................3
1.2.1 Operation ...................................3
1.2.2 Lifting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2.3 Transport....................................3
2 Ex nA/ec and tc motors .......................4
2.1 Cable glands and connection...................4
2.2 Maintenance and spare parts ..................4
2.3 Frequency converter operation .................4
3 Receipt, transport and storage..................5
3.1 Receipt and transport .........................5
3.2 Storage......................................5
4 Installation and commissioning ................7
4.1 General .....................................7
4.2 Support and alignment........................7
4.3 Measure the insulation resistance ..............7
5 Electrical connection and cabling ...............9
5.1 Direction of rotation ..........................9
5.2 Terminal box and terminal board ...............9
5.3 Connection diagram .........................10
6 Thermal protection ..........................11
6.1 Thermal protection with thermistors (PTC)......11
6.2 Thermal protection with bimetal switches ......11
6.3 Temperature monitoring with Pt100 sensors ....11
6.4 Heater strip.................................11
7 Motor data and parts ........................12
7.1 Exploded view of motor and cross-section view..12
7.2 Bearing types for motor sizes. . . . . . . . . . . . . . . . . . 13
7.3 Permissible axial and radial bearing loads.......17
8 Frequency converter operation ................30
8.1 Operating speed .............................30
8.2 Winding insulation ..........................30
8.3 Bearing deterioration in relation to VFD.........30
8.4 Additional solutions for limitation
of bearing currents ..........................31
8.5 Hoyer VFD application suggestions.............31
9 Operation ..................................32
9.1 Considerations ..............................32
9.2 Checklist ...................................32
9.3 Cooling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
9.4 Motor operation with a VFD ...................33
9.5 Operating speed .............................33
10 Maintenance................................34
10.1 General ....................................34
10.2 Bearings and re-greasing .....................34
11 Disposal and environmental protection ........37
11.1 Product disposal information. . . . . . . . . . . . . . . . . . 37
11.2 RoHS and REACH ............................37
11.3 Electric motors ..............................37
11.4 Packaging material ..........................37

3
Motor
Manual
1 Notice
This manual must be followed to ensure proper and safe
installation, operation and maintenance of the motor. Prod-
ucts must be handled by qualified personnel, and health
and safety requirements and national legislation must be
observed. Ignoring these instructions will invalidate all ap-
plicable warranties of Hoyer Motors.
1.1 General information
This manual concerns the following types of standard low
voltage induction motors from Hoyer Motors: HMA4, HMC4,
HMA3, HMC3, HMA2, HMC2, HMD, HMT, MS, Y2E1, Y2E2,
YDT. Explosion-proof low voltage motors are not covered by
this manual.
All motors are manufactured in accordance with IEC/
EN 60034-1 and IEC/EN 60072 unless otherwise specified.
Motors are rated as standard for the ambient temperature
range of -20°C to +40°C and site altitudes up to 1000 m above
sea level. Low voltage motors are components for installa-
tion in machinery. The motors are CE marked according to
the Low Voltage Directive 2014/35/EU.
Motors not fulfilling the IE3 efficiency level must, before the
1st of July 2021, be equipped with variable frequency drives
(VFD) when used in the EU. Information about the required
use of a VFD must be shown on the nameplate or an ad-
ditional label or plate, and in the technical documentation
of the motor.
1.2 Safety instructions
Personnel who commission, transport, maintain or install
motors should have obtained qualified training and safety
knowledge. Safety equipment is necessary to prevent ac-
cidents. Local regulations and requirements must also be
observed. Failure in operation can cause injury to personnel
and damage to the motor.
The specified data and recommendations must be observed to
avoid hazardous situations and the risk of injury or damage.
Custom designs and other non-standard motors can vary in
technical details. If in doubt contact Hoyer Motors, stating
the type designation and serial number of the motor.
1.2.1 Operation
For safe operation it must be ensured that no external parts
interfere with the rotating shaft.
The shaft key must be securely fastened in the keyway be-
fore the motor is started. If the motor is run for no-load
testing, the key must be fixed in the keyway or removed.
The motor must be handled and operated properly to avoid
accidents during operation. If the motor is not running
properly, switch off the power supply. The power supply
must be switched off when troubleshooting.
Maintenance is required and must be done on a regular ba-
sis to prevent failures.
1.2.2 Lifting
For safety reasons all Hoyer motors with frame size 100 or
larger are equipped with eyebolts for lifting. Before lifting
the motor, ensure that the eyebolts are undamaged and
screwed tight. When lifting the motor, make sure that the
motor is not attached to any equipment or mounted by the
feet, shaft or flange. Only use the main eyebolts on the mo-
tor frame to lift the motor. Do not use damaged eyebolts.
If crane slings are used, prevent them from slipping and
maintain full control when lifting the motor.
1.2.3 Transport
The motor must be fixed on a pallet (by ropes, cables, bolts,
etc.) during transport. This means it must be secured so
it cannot move or be damaged during transport. Broken
equipment and unstable machines can cause serious inju-
ries.

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Motor
Manual
2 Ex nA/ec and tc motors
Below information is a special note for Ex nA/ec and tc mo-
tors.
Designation of motors is according to EN/IEC standard: II 3D
Ex tc IIIB T120°C Dc and II 3G Ex nA/ec IIC T3 Gc. The motors
must only be connected to certified Ex relays. The hazard-
ous 3-phase asynchronous motors are in accordance with
EU directive 2014/34/EU and international standards EN/IEC
60079-0, EN/ IEC 60079-07, EN/IEC 60079-15 and IEC 60079-
31. Only one electrical installation may be installed in one
specified area(zone). For Ex ec parameter Time E must be
taken into account.
2.1 Cable glands and connection
Only Ex certified cable glands may be used. Unused glands
must be closed by Ex certified blind caps.
When connecting, make sure that a permanently safe elec-
trical connection is maintained, both for the main supply
and earth connection. Installations must be in accordance
with actual standards for installation in hazardous area.
2.2 Maintenance and spare parts
The user is responsible for changing parts in accordance
with life time of arts, in particular: bearings, grease and lu-
brication of shaft sealings. Installation, maintenance, repair
and replacement of parts in this type of motors must only
be carried out by qualified specialists according to EU di-
rective 99/92, EN/IEC 60079-14, EN/IEC 60079-17 and EN/IEC
60079-19.
It is recommended that the IEC standard is followed ac-
cording to the temperature and dust on the motor surface.
Surface dust must not cause increase of motor tempera-
ture. Regularly cleaning is recommended. The radial shaft
sealing ring is part of the EX certification. It is important
that the sealing rings are intact. The shaft sealing must be
checked regularly, and if it is dry it must be lubricated. It
is recommended that the motors are re-lubricated regular-
ly. When replacing seal rings, use original ones. Replacing
bearings also means replacing the seals. All machines must
be inspected regularly for mechanical damage.
2.3 Frequency converter operation
For converter use, PTC has to be connected and only for
quadratic torque application, in frequency range 20-60Hz,
switching frequency ≥2000 Hz and Inverter output du/dt ≤
1350V/0,8µs by reinforced winding du/dt ≤1560V/0,5µs

5
Motor
Manual
3 Receipt, transport and storage
3.1 Receipt and transport
Upon receipt and for transport:
• Use transport locks for all transport operations.
• Avoid moisture and shocks during transport.
• Check the motor for external damage.
• If damage is found, inform the sales representative of
Hoyer Motors.
• Check all nameplate data and compare it with the re-
quirements for the motor.
• Remove transport locks if present.
• Turn the shaft by hand to check for free rotation.
3.2 Storage
• Ensure the use of correct lifting lugs. Lifting lugs are
dimensioned for the weight of the motor.
• Do not apply extra weight.
• If necessary, use suitable special equipment such as
lifting gear and ropes.
• Store in a dry, dust-free and vibration-free location.
• Carefully consider long-term storage procedures.
Short-term storage (less than 2 months)
The motor should be stored in a place with a controllable
environment. A good warehouse or storage location has:
• Measure the insulation resistance and temperature
of the windings to check whether the motor has been
stored improperly, even for a short time.
• A stable temperature, preferably in the range from 10°C
(50°F) to 50°C (120°F). If the anti-condensation heaters
are energised and the surrounding air is above 50°C
(120°F), ensure that the motor is not overheated.
• Low air humidity, preferably below 75%. The motor
temperature must be kept above the dew point shown
in the figure to prevent water vapour from condensing
inside the motor. If the motor is equipped with anti-
condensation heaters, they should be energised. Proper
operation of the anti-condensation heaters must be
checked periodically. If the motor is not equipped with
anti-condensation heaters, other methods of heating
the motor must be used to prevent water vapour from
condensing in the motor.
• A stable support free from excessive vibration and
shocks. If vibration levels are expected to be too large,
the motor should be isolated by placing suitable rubber
blocks under the motor feet.
• Air that is ventilated, clean and free from dust and cor-
rosive gases.
• Protection against harmful insects, vermin and chemi-
cals.
Long-term storage (more than 2 months)
In addition to the measures described for short-term stor-
age, the following actions are necessary:
• Measure the insulation resistance and temperature
of the windings to check whether the motor has been
stored improperly, even for a short time.
• Check the condition of the paintwork every three
months. If corrosion is seen, remove it and apply a new
coat of paint.
• Check the condition of the anti-corrosion coating on
bare metal surfaces every three months. If corrosion is
seen, remove it gently with emery cloth and apply an
anti-corrosion coating.
• Provide small ventilation openings if the motor is
stored in a wooden crate. Prevent water, dust and in-
sects from entering the crate.

6
Motor
Manual
Outdoor storage
If the motor must be stored outdoors, never leave the motor
as is in the standard transport packaging. Instead the motor
must be:
• Taken out of its plastic wrap.
• Covered to completely prevent rain from entering the
motor. The cover should allow ventilation of the motor.
• Placed on at least 100 mm (4”) high rigid supports, to
ensure that no moisture can enter the motor from be-
low.
• Protected against harmful insects and vermin.
• Packed in special outdoor packaging.
Drain plugs
The motor is equipped with drain plugs to let condensa-
tion water drain out. The drain plugs should be open when
stored.
Horizontal mounting: For horizontally mounted motors,
drain plugs are fitted at each end of the motor.
Vertical mounting: For vertically mounted motors, a mini-
mum of two drain plugs are fitted on the lower end shield.

7
Motor
Manual
4 Installation and commissioning
4.1 General
To ensure correct protection and connection of the motor,
check the nameplate data before installation and commis-
sioning. Before working on the motor, disconnect and lock
out the power supply. Before starting the motor, remove the
transportation bracket and clean the shaft, feet and flange
to remove the protective coating. It is recommended to
grease the bearing during initial commissioning according
to Table 15, Re-greasing interval and amount.
When performing installation and commissioning, make
sure that the motor is earthed. When making insulation re-
sistance measurements for commissioning, short the wind-
ing terminals before disconnecting the test leads to avoid
the risk of electric shock. If the motor windings have been
in contact with sea water, they must be inspected (contact
Hoyer Motors).
Avoid resonances with a rotational frequency at twice the
mains frequency due to assembly. Turn the rotor and listen
for abnormal rubbing noises. Check the direction of rota-
tion with the motor uncoupled. When mounting or remov-
ing couplings or other drive elements, cover them with a
touch guard.
For a test run with the motor uncoupled, secure or remove
the key(s) on the rotor shaft. Avoid excessive radial and
axial bearing loads, except with roller bearings or angular
contact bearings (see section 6.2).
Rotor balance:
• Half key as standard: Couplings must be half key bal-
anced. If part of the shaft key is visible, be sure to per-
form mechanical balancing.
• Full key (non-standard): Couplings must be balanced
without a key.
Ensure the required ventilation and clearance from other
objects; see section 8.4. Do not obstruct ventilation open-
ings, and ensure that exhaust air from other equipment is
not drawn into the ventilation openings. Otherwise the mo-
tor may overheat.
4.2 Support and alignment
The end-user is fully responsible for construction of the
support. The contact surface for the motor feet or flange
must be free of paint, dirt and other objects. Otherwise the
motor height may be incorrect or the motor may be mis-
aligned.
Mount the motor on a sturdy, clean and flat support. It must
be sufficiently rigid to withstand short circuit forces. It is
important to ensure that the mounting conditions do not
cause resonance at the rotational frequency or twice the
supply frequency.
Always use suitable tools to mount or remove drive com-
ponents. Do not hit the drive components with a hammer,
as this can damage the bearings or degrade the balancing.
The rotors are balancing with a half key for G2.5 according
to ISO 21940-11. Make sure that the drive components are
the same. Correct alignment is essential to avoid bearing
failure, shaft failure and vibration failure. Use only suita-
ble alignment methods. Re-check the alignment after final
tightening of the bolts or studs. Check that drain holes and
plugs face downwards and are fully functional and unob-
structed. With a motor that is installed outdoors or that
does not run continuously, open the drain hole so the motor
housing is ventilated.This keeps the motor dry if a heater is
not fitted in the motor or not energised.
Check these measurements before adjusting the alignment
- not all variants are covered:
• Vertical positioning: To avoid motor tipping and bend-
ing, use shims to stabilise the motor.
• Horizontal positioning: Fix the motor axial position and
make sure the axial gap is uniform.
• Stable support: Vibration free, accurate machine align-
ment and balanced drive.
• Foot/Foot-flange mounting: Mount the motor with
the right bolts and tightening torques. Make sure the
motor feet and/or flange bolts are in full contact with
the mounting surface.
4.3 Measure the insulation resistance
Before commissioning, check the datasheet and measure
the insulation resistance without any supply wires con-
nected, as they can distort the measurement. If the meas-

8
Motor
Manual
ured insulation resistance is less than 10 MΩat 25°C, the
winding must be oven dried. The nominal value is typically
100 MΩ. If the measured value is less than 2 MΩ, the insu-
lation resistance is not acceptable. When oven drying the
windings, set the oven temperature to approximately 85°C
for 10 to 18 hours, followed by 100°C for 7 to 9 hours. The
nominal insulation resistance drops by 50% for every 20°C
rise in motor temperature. Measuring equipment must al-
ways be calibrated at least every year. Note that drain plugs
or valves must be open during heating. After heating, make
sure the plugs are fitted again.

9
Motor
Manual
5 Electrical connection and cabling
The motors are designed to operate with supply variations
conforming to IEC 60034-1, Zone A: ±5% voltage and ±2%
frequency. The motors will operate with greater variations
according to Zone B of IEC 60034-1 section 7.3, but with larg-
er variation in performance.
Three-phase motors manufactured by Hoyer Motors are
designed according to IEC 60038 and IEC 60034-1 and can
operate with the rated power and torque load within the
mains voltage and frequency variations of zone A and, for a
short time, of zone B.
Single-phase Hoyer motors can operate under these condi-
tions with mains voltage and frequency variations of ±5%
and ±1%, respectively. If the voltage variation is greater, sin-
gle-phase motors can only be operated with the torque load
adjusted in proportion to the voltage dip.
Earthing must be carried out according to local regulations
before the motor is connected to the supply voltage.
5.1 Direction of rotation
Motors are supplied as standard with clockwise rotation as
seen from the drive end. The phase sequence is L1, L2, L3
as connected to the terminals shown in Figure 1. To change
the direction of rotation, change the phase sequence by (for
example) swapping L1 and L2. If the motor is unidirectional,
make sure the shaft rotates in the same direction as the
marked arrow.
5.2 Terminal box and terminal board
The terminal box contains the earthing terminal, terminal
board and terminals for heating elements and temperature
sensors (PTC and Pt100). Other auxiliary devices may also
be located in the terminal box. Hoyer motors are equipped
with three PTC sensors as standard. Heating elements are
common in Hoyer marine motors with frame size 160 or
larger.
Before working on the motor or attached machinery:
• Ensure that all supply voltages are switched off and
protected against reactivation.
• Switch off auxiliary power circuits for accessories such
as anti-condensation heaters.
• Check the supply voltage and frequency by comparing
them with the rated data on the nameplate and the
data sheet.
• Ensure that the terminal box is clean and dry.
• Close unused cable glands with blind caps.
• Check the terminal box cover gasket before refitting.
Always use suitable cable lugs for connection of all main
supply cables and cables for auxiliary devices, and ensure
that cables are corrected to the correct terminals.
Unless otherwise stated, motors are only intended for fixed
installation. Cable glands/blind caps for entry points are met-
ric. If cable glands or blind caps are replaced, the replace-
ments must be at least the same IP class as the existing items.
Connection diagrams for the main supply and accessories
such as PTC sensors or heaters are located inside the termi-
nal box or cast in the terminal box cover.
All crimped connections should be made according to
IEC 60352-2.
Tightening torques for terminal board studs:
Thread M4 M5 M6 M8 M10 M12 M14 M16 M20
T (Nm) 1.8 2.5 3.5 7.0 12 18 35 55 80
Table 1 Terminal board tightening torques
Tightening torques for terminal box cover:
Thread HMA -
M4
HMC -
M4
HMA -
M5
HMC -
M5
M6 M8 M10 M12
T (Nm) 1.1-1.3 2-4 1.1-1.3 2-4 6-8 15.5-17.5 31-35 56-60
Table 2 Terminal box cover tightening torques
To comply with EMC requirements and provide proper
earthing, cables must be shielded and EMC cable glands are
recommended. All incoming parts must have the same po-
tential as the motor.
Cable glands and seals in cable entries must be suitable
for the type and diameter of the cable concerned (clamp-
ing range). It is recommended that cables are mechanically
protected and clamped close to the terminal box to fulfil the
requirements of IEC 60079 and local requirements.

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Motor
Manual
5.3 Connection diagram
As standard all three-phase motors are suitable for 400 V
connection, unless otherwise stated.
• Motors with nameplate data D/Y 230/400V are connect-
ed as star (Y).
• Motors with nameplate data D/Y 400/690V are connect-
ed as delta (D).
The connection diagram is labelled inside the terminal box.
Generally, power to motors must be supplied and protected
through protective devices such as RCDs, fuses, MCBs, MC-
CBs, etc. The connection diagram for Y/D is shown in Fig-
ure 1.
Figure 1 Connection types Y/D
Star-delta starting
Hoyer standard motors are suitable for star-delta starting.
The starting current and torque in Y mode are approxi-
mately one-third of the starting current and torque in D
mode. Make sure there is enough starting torque to acceler-
ate the total load with star connection.

11
Motor
Manual
6 Thermal protection
Thermal protection is used to prevent motor overheating,
and to monitoring purposes.
6.1 Thermal protection with thermistors (PTC)
All standard motors (IE1 and IE2 only from 160 and up) have
PTC thermistors located in the stator windings.
It is recommended to connect the PTC thermistors to the
variable speed drive or other protective equipment by ap-
propriate means.
PTC thermistors are used to protect the motor from over-
heating. PTC thermistors are provided in sets of three, fitted
in each phase, unless otherwise stated. The PTC resistance
is 60 to 750 Ωat 20°C. The resistance rises in proportion to
the temperature. At the peak temperature the resistance
approaches infinity. This type of sensor is used in combina-
tion with a PLC or a relay for motor protection.
6.2 Thermal protection with bimetal switches
Thermal protection with bimetal switches is not stand-
ard and can be added in the motors upon request. Bimetal
switches are used to protect the motor from overheating.
Bimetal switches are normally fitted in sets of three, wired
in series. Each switch is placed on a phase winding and
opens or closes at a specific winding temperature. The bi-
metal switches are intended to be connected to an external
protective relay that switches off power if the motor over-
heats.
6.3 Temperature monitoring with Pt100 sensors
Pt100 sensors are not standard and can be added upon re-
quest. Pt100 sensors can be fitted in the motor both in the
windings and in the bearings. Pt100 sensors can track the
temperature rise where they are fitted.This is often used for
monitoring motor temperatures, for example in windings
or bearings, and it can indicate overheating.The signals can
be processed and used in PLCs.
6.4 Heater strip
A heater strip can be fitted in a motor. A heater strip allows
a minimum temperature to be maintained inside the mo-
tor. This prevent moisture condensation during cool-down
of the motor. Heater strips are available with two different
rated voltages (220–240 V and 110–120 V). The heater strip
can be energised when the motor is not running. Heater
strips are standard for marine motors with frame size 160
or larger.

12
Motor
Manual
7 Motor data and parts
7.1 Exploded view of motor and cross-section
view
Figure 2 below shows an exploded view of a cast iron motor.
Figure 3 shows a cross-section view of an aluminium motor.
Figure 2 Exploded view
of a cast iron motor
Item No. Part name Item No. Part name
1Key 24 Spring wave washer
2 Sealing ring_De 25 Outer bearing cap_NDE
3 Bolt 26 Bolt
4 Outer bearing cap_DE 27 Sealing ring_NDE
5 Bolt & O-ring 28 Cooling fan
6 Grease pipe 29 Circlip
7 Circlip 30 Bolt & Washer
8 Oil slinger 31 Fan cover
9 Bearing_DE 32 Rubber plug
10 B3 and shield_DE 33 Eye bolt
11 Bolt & Washer 34 Bolt
12 Inner bearing cap_DE 35 Terminal box cover
13 Rotor with shaft 36 Gasket
14 Winding stator 37 Terminal box base
15 Bolt & O-ring 38 Blind cap
16 B3 housing 39 Cable gland
17 Bolt & Washer 40 Terminal board
18 Inner bearing cap_NDE 41 Bolt
19 Bearing_NDE 42 Gasket
20 B3 end shield_NDE 43 Grease nipple
21 Bolt & Washer 44 B5 housing
22 Oil slinger 45 B5 flange
23 Circlip
Over Hadstenvej 42, DK-8370 Hadsten
Tel : [phone]
Fax: [phone]
www.hoyermotors.com
Hoyer Motors
DRAWN
31312
01
kg
BREAK SHARP
HMC2-315-exploded_V02
Motors and for no other purpose.
SHEET 1 OF 1
WEIGHT:
CI
TIH
A3
SCALE:1:50
DWG NO.
TITLE:
CHK'D
APPV'D
REVISION
DO NOT SCALE DR AWING
MATERIAL:
DATESIGNATURE
NAME
EDGES
Q.A
MFG
DEBUR AND
© 2010 Hoyer Motors All intellectual property rights and all rights in know-how in relation to this drawing may not be reproduced, stored, or transmitted in any form by any means (electronic, mechanical,photocopying, recording or otherwise) without the prior written consent of Hoyer Motors. It is to be used only for the purposes specified by Hoyer
20190711
34
10
41
42
4445 43
1 2 3 54 7 8 9 12613 1511
40
16 17 18 19 2120 22 23 24 25 26 27 31
32
28 29 30
33
35
36
37
39
38
14
Item No. Part name Item No. Part Name
1 Key 24 Spring wave washer
2 Sealing ring_DE 25 Outer bearing cap_NDE
3 Bolt 26 Bolt
4 Outer bearing cap_DE 27 Sealing ring_NDE
5 Bolt&O-ring 28 Cooling fan
6 Grease pipe 29 Circlip
7 Circlip 30 Bolt&Washer
8 Oil slinger 31 Fan cover
9 Bearing_DE 32 Rubber plug
10 B3 end shield_DE 33 Eye bolt
11 Bolt&Washer 34 Bolt
12 Inner bearing cap_DE 35 Terminal box cover
13 Rotor with shaft 36 Gaket
14 Winding stator 37 Terminal box base
15 Bolt&O-ring 38 Blind cap
16 B3 housing 39 Cable gland
17 Bolt&Washer 40 Terminal board
18 Inner bearing cap_NDE 41 Bolt
19 Bearing_NDE 42 Gasket
20 B3 end shield_NDE 43 Grease nipple
21 Bolt&Was her 44 B5 housing
22 Oil slinger 45 B5 flange
23 Circlip
Note that the bearing retainer plate is secured on the inside
at the drive end.

13
Motor
Manual
Parts list
1 Rotor and shaft 7 Motor housing 13 Cooling fan
2 DE flange 8 Stator winding 14 Retaining ring
3 DE oil seal 9 NDE shield 15 Fan cover
4 DE bearing 10 NDE bearing 16 Feet
5 Bearing retainer plate (secured) 11 Preload washer 17 Key
6 Terminal box 12 NDE oil seal
Over Hadstenvej 42, DK-8370 Hadsten
Tel : [phone]
Fax: [phone]
www.hoyermotors.com
Hoyer Motors
DRAWN
BREAK SHARP
Cross-Sectional view_HMA motor
31951
CHK'D
kg
01
WEIGHT:
Al.
A3
SHEET 1 OF 1SCALE:1:5
DWG NO.
TITLE:
REVISION
APPV'D
MFG
DO NOT SCALE DRAWING
MATERIAL:
DATESIGNATURE
NAME
EDGES
Q.A
DEBUR AND
© 2010 Hoyer Motors All intellectual property rights and all rights in know-how in relation to this drawing may not be reproduced, stored, or transmitted in any form by any means (electronic, mechanical,photocopying, recording or otherwise) without the prior written consent of Hoyer Motors. It is to be used only for the purposes specified by Hoyer
Motors and for no other purpose.
911 13
16
5
1517
12
142 6 7 8 10 14
3
1 Rotor w. shaft 10 N.D.E. bearing
2 D.E. flange 11 Pre-load washer
3 D.E.oil seal ring 12 N.D.E.oil seal ring
4 D.E. bearing 13 Cooling fan
5 Bearing plate 14 Snap ring
6 Terminal box 15 Fan cover
7 Motor housing 16 Feet
8 Winding stator 17 Key
9 N.D.E. shield
Part list
7.2 Bearing types for motor sizes
The general bearing types and sizes for the various motor
sizes and IE classes are shown in Table 2, Table 3, Table 5
and Table 6 for classes IE1 to IE4, respectively. Type 2Z and
2RS bearings or equivalent closed bearings are greased for
life. Always ensure that the shaft seals are intact. Note that
differences are possible between the bearing size and the
actual frame size.
Motors with re-greaseable bearings must be greased ac-
cording to Section 10.2 and the greasing data plate on the
motor. In case of doubt, contact Hoyer Motors.
Figure 3: Cross-section view
of an aluminium motor

14
Motor
Manual
Frame size Drive end (DE) Non-drive end (NDE)
2-pole 4/6/8-pole 2-pole 4/6/8-pole
63 6201-2RS/C3 6201-2RS/C3
71 6203-2RS/C3 6202-2RS/C3
80 6205-2RS/C3 6204-2RS/C3
90 6206-2RS/C3 6205-2RS/C3
100 6206-2RS/C3 6206-2RS/C3
112 6306-2RS/C3 6306-2RS/C3
132 6308-2RS/C3 6308-2RS/C3
160 6309-2RS/C3 6309-2RS/C3
180 6311/C3 6311/C3
200 6312/C3 6312/C3
225 6312/C3 6313/C3 6312/C3
225M1 6313/C3 6313/C3
225M1 High Output 6313/C3 6314/C3 6313/C3
250 6313/C3 6314/C3 6313/C3
250M1 High Output 6314/C3 6315/C3 6314/C3
280 6314/C3 6317/C3 6314/C3
280M1 High Output 280MB
High Output 6315/C3 6317/C3 6315/C3 6317/C3
315 6317/C3 NU319 (B3) 6317/C3 6319/C3
6319/C3 (B5/B35)
355 6319/C3 NU322 (B3) 6319/C3 6322/C3
6322/C3 (B5/B35)
400 6319/C3 6326/C3 (≤560 kW) 6319/C3 6326/C3
Table 2 Standard bearing sizes in IE1 Hoyer motors

15
Motor
Manual
Frame size Drive end (DE) Non-drive end (NDE)
2-pole 4/6/8/10/12-pole 2-pole 4/6/8/10/12-pole
56 6201-2Z/C3 6201-2Z/C3
63 6201-2Z/C3 6201-2Z/C3
71 6202-2Z/C3 6202-2Z/C3
80 6204-2Z/C3 6204-2Z/C3
90 6205-2Z/C3 6205-2Z/C3
100 6206-2Z/C3 6206-2Z/C3
112 6306-2Z/C3 6306-2Z/C3
132 6308-2Z/C3 6308-2Z/C3
160 6309-2Z/C3 6309-2Z/C3
180 6311/C3 6311/C3
200 6312/C3 6312/C3
225 6312/C3 6313/C3 6312/C3
225 High Output 6313/C3 6314/C3 6313/C3
250 6313/C3 6314/C3 6313/C3
250 High Output 6314/C3 6315/C3 6314/C3
280 6314/C3 6317/C3 6314/C3
280 High Output 6317/C3 6317/C3
315 6317/C3 6319/C3 6317/C3
315 High Output 6319/C3 6319/C3
355 6319/C3 6322/C3 6319/C3
400 6319/C3 6326/C3 6319/C3 6326/C3
Table 3 Standard bearing sizes in IE2 Hoyer motors

16
Motor
Manual
Frame size Drive end (DE) Non-drive end (NDE)
2-pole 4/6-pole 2-pole 4/6-pole
80 6204-ZZ/C3 6204-2Z/C3
90 6205-2Z/C3 6205-2Z/C3
100 6206-2Z/C3 6206-2Z/C3
112 6306-2Z/C3 6306-2Z/C3
132 6308-2Z/C3 6308-2Z/C3
160 6309-2Z/C3 6309-2Z/C3
180 6311-2Z/C3 6311-2Z/C3
200 6312/C3 6312/C3
225 6312/C3 6313/C3 6312/C3
250 6313/C3 6314/C3 6313/C3
280 6314/C3 6317/C3 6314/C3
315 6317/C3 6319/C3 NU319 6317/C3 6319/C3
355 6319/C3 6322/C3 NU322 6319/C3 6322/C3
Table 4 Standard bearing sizes in IE3 Hoyer motors
Frame size Drive end (DE) Non-drive end (NDE)
2-pole 4/6-pole 2-pole 4/6-pole
80 6204-ZZ/C3 6203-ZZ/C3
90 6205-ZZ/C3 6204-ZZ/C3
100 6306-ZZ/C3 6205-ZZ/C3
112 6306-ZZ/C3 6205-ZZ/C3
132 6208-ZZ/C3 6206-ZZ/C3
160 6209-ZZ/C3 6209-ZZ/C3
180 6211/C3 6311/C3 6211/C3
200 6212/C3 6312/C3 6212/C3
225 6312/C3 6313/C3 6312/C3
250 6313/C3 6314/C3 6313/C3
280 6314/C3 6317/C3 6314/C3
315 6317/C3 6319/C3 NU319 6317/C3 6319/C3
355 6319/C3 6322/C3 NU322 6319/C3 6322/C3
Table 5 Standard bearing sizes in IE4 Hoyer motors

17
Motor
Manual
Frame size Grease (g) 2-pole (h) 4-pole (h) 6-pole (h) 8-pole (h)
160 20 4200 7000 8500 8500
180 20 4200 7000 8500 8500
200 25 3100 6500 8500 8500
225 25 3100 6500 8500 8500
250 35 2000 6000 7000 7000
380 35 2000 6000 7000 7000
315 50 1500 5500 6500 6500
355 60 1000 4000 5000 6000
400 80 800 3000 4000 6000
Table 6 Re-greasing interval and amount of grease
7.3 Permissible axial and radial bearing loads
This section provides information on radial and axial loads
for standard Hoyer IE3 motors. Values can vary. If specific
calculations are needed for other IE classes or environmen-
tal requirements, please contact Hoyer Motors. Specific per-
missible axial and radial loads on bearings can be provided
upon request by contacting Hoyer Motors.
The main conditions for axial and radial loads are listed be-
low. Permissible loads will vary under deviating conditions.
• 25°C ambient temperature (80°C bearing temperature)
• WT grease for closed bearings
• Pure axial or radial loads
• Normal bearing cleanliness (only for shielded bearing
calculations (see L10h and grease lifetime, especially
for vertical mounting))
• Vibration levels below limits stated in IEC 60034-14
• No or insignificant bearing current
• Wave spring forces are worst case (maximum possible
value)
Note the following:
Motors equipped with cylindrical roller bearings must only
be operated with a radial load on the motor shaft. Ensure
compliance with the minimum load and preload. Other
types of mounting may damage the bearings.
Motors equipped with angular contact bearings must only
be operated with a axial load on the motor shaft in the cor-
rect direction. The load must not change direction, as oth-
erwise the bearings may be damaged. Ensure compliance
with the minimum load and preload.
Permissible radial loads for deep groove ball bearings
X0 Permissible radial load at the start of the shaft extension
Xavg Permissible radial load at the middle of the shaft extension
Xmax Permissible radial load at the end of the shaft extension
Table 7 Load definitions

18
Motor
Manual
Permissible radial loads for deep groove ball bearings
Frame
size Bearing size Motor info
Speed Frequency Poles 20.000 running hours 40.000 running hours
[RPM] [Hz] X0 [N] Xavg [N] Xmax
[N] X0 [N] Xavg [N]
Xmax
[N]
80 6204-2Z/C3
HMA3 80 2-4 1500 50 4 990 884 799 786 702 634
HMA3 80 2-2 3000 50 2 786 702 634 624 557 503
HMA3 80 1-2 3000 50 2 786 702 634 624 557 503
90 6205-2Z/C3
HMA3 90L-6 1000 50 6 1284 1155 1049 1019 916 833
HMA3 90S-6 1000 50 6 1263 1114 997 1002 884 791
HMA3 90L-4 1500 50 4 1121 1009 916 890 801 727
HMA3 90S-4 1500 50 4 1103 973 871 876 773 691
HMA3 90L-2 3000 50 2 890 801 727 706 635 577
HMA3 90S-2 3000 50 2 876 773 691 695 613 549
100 6206-2Z/C3
HMA3 100L-6 1000 50 6 1730 1532 1375 1373 1216 1091
HMA3 100L2-4 1500 50 4 1511 1338 1201 1199 1062 953
HMA3 100L1-4 1500 50 4 1511 1338 1201 1199 1062 953
HMA3 100L-2 3000 50 2 1199 1062 953 952 843 757
112 6306-2Z/C3
HMA3 112M-6 1000 50 6 2503 2249 2042 1986 1785 1621
HMA3 112M-4 1500 50 4 2186 1965 1784 1735 1559 1416
HMA3 112M-2 3000 50 2 1735 1559 1416 1377 1238 1124
132 6308-2Z/C3
HMA3 132M2-6 1000 50 6 3581 3146 2805 2842 2497 2226
HMA3 132M1-6 1000 50 6 3581 3146 2805 2842 2497 2226
HMA3 132S-6 1000 50 6 3521 3037 2670 2794 2410 2119
HMA3 132M-4 1500 50 4 3128 2748 2450 2483 2181 1945
HMA3 132S-4 1500 50 4 3076 2653 2332 2441 2106 1851
HMA3 132S2-2 3000 50 2 2441 2106 1851 1938 1671 1469
HMA3 132S1-2 3000 50 2 2441 2106 1851 1938 1671 1469
160
6309-2Z/C3
HMC3 160L-6 1000 50 6 4586 4010 3563 3640 3183 2828
HMC3 160M-6 1000 50 6 4505 3877 3402 3576 3077 2700
HMC3 160L-4 1500 50 4 4006 3503 3112 3180 2780 2470
HMC3 160M-4 1500 50 4 3936 3386 2972 3124 2688 2359
HMC3 160L-2 3000 50 2 3180 2780 2470 2524 2207 1961
HMC3 160M1-2 3000 50 2 3124 2688 2359 2479 2133 1872
HMC3 160M1-2 3000 50 2 3124 2688 2359 2479 2133 1872
6309/C3
HMC3 160L-6 1000 50 6 4586 4010 3563 3640 3183 2828
HMC3 160M-6 1000 50 6 4505 3877 3402 3576 3077 2700
HMC3 160L-4 1500 50 4 4006 3503 3112 3180 2780 2470
HMC3 160M-4 1500 50 4 3936 3386 2972 3124 2688 2359
HMC3 160L-2 3000 50 2 3180 2780 2470 2524 2207 1961
HMC3 160M1-2 3000 50 2 3124 2688 2359 2479 2133 1872
HMC3 160M1-2 3000 50 2 3124 2688 2359 2479 2133 1872

19
Motor
Manual
Frame
size Bearing size Motor info
Speed Frequency Poles 20.000 running hours 40.000 running hours
[RPM] [Hz] X0 [N] Xavg [N] Xmax
[N] X0 [N] Xavg [N]
Xmax
[N]
180
6311-2Z/C3
HMC3 180L-6 1000 50 6 6287 5562 4987 4990 4415 3958
HMC3 180L-4 1500 50 4 5492 4859 4357 4359 3857 3458
HMC3 180M-4 1500 50 4 5433 4753 4223 4312 3772 3352
HMC3 180M-2 3000 50 2 4312 3772 3352 3423 2994 2661
6311/C3
HMC3 180L-6 1000 50 6 6287 5562 4987 4990 4415 3958
HMC3 180L-4 1500 50 4 5492 4859 4357 4359 3857 3458
HMC3 180M-4 1500 50 4 5433 4753 4223 4312 3772 3352
HMC3 180M-2 3000 50 2 4312 3772 3352 3423 2994 2661
200
6312-2Z/C3
HMC3 200L2-6 1000 50 6 7126 6363 5747 5656 5050 4561
HMC3 200L1-6 1000 50 6 7126 6363 5747 5656 5050 4561
HMC3 200L-4 1500 50 4 6225 5558 5020 4941 4412 3985
HMC3 200L2-2 3000 50 2 4941 4412 3985 3921 3501 3163
HMC3 200L1-2 3000 50 2 4941 4412 3985 3921 3501 3163
6312/C3
HMC3 200L2-6 1000 50 6 7126 6363 5747 5656 5050 4561
HMC3 200L1-6 1000 50 6 7126 6363 5747 5656 5050 4561
HMC3 200L-4 1500 50 4 6225 5558 5020 4941 4412 3985
HMC3 200L2-2 3000 50 2 4941 4412 3985 3921 3501 3163
HMC3 200L1-2 3000 50 2 4941 4412 3985 3921 3501 3163
225
6312/C3
HMC3 225M-6 1000 50 6 7043 6148 5455 5590 4880 4329
HMC3 225M-4 1500 50 4 6152 5371 4765 4883 4263 3782
HMC3 225S-4 1500 50 4 6105 5293 4671 4846 4201 3708
HMC3 225M-2 3000 50 2 4883 4382 3974 3876 3478 3154
6313-2Z/C3
HMC3 225M-6 1000 50 6 8071 7040 6243 6406 5588 4955
HMC3 225M-4 1500 50 4 7051 6150 5454 5596 4882 4329
HMC3 225S-4 1500 50 4 6998 6061 5346 5554 4811 4243
HMC3 225M-2 3000 50 2 5596 5019 4549 4442 3984 3611
6313/C3
HMC3 225M-6 1000 50 6 8071 7040 6243 6406 5588 4955
HMC3 225M-4 1500 50 4 7051 6150 5454 5596 4882 4329
HMC3 225S-4 1500 50 4 6998 6061 5346 5554 4811 4243
HMC3 225M-2 3000 50 2 5596 5019 4549 4442 3984 3611
L10 Grease life 37100 h
L10 Grease life 32700 h
L10 Grease life 28800 h

20
Motor
Manual
Frame
size Bearing size Motor info
Speed Frequency Poles 20.000 running hours 40.000 running hours
[RPM] [Hz] X0 [N] Xavg [N] Xmax
[N] X0 [N] Xavg [N]
Xmax
[N]
250
6313-2Z/C3
HMC3 250M-6 1000 50 6 8138 7210 6472 6459 5723 5137
HMC3 250M-4 1500 50 4 7109 6299 5654 5642 4999 4488
HMC3 250M-2 3000 50 2 5642 4999 4488 4478 3968 3562
6313/C3
HMC3 250M-6 1000 50 6 8138 7210 6472 6459 5723 5137
HMC3 250M-4 1500 50 4 7109 6299 5654 5642 4999 4488
HMC3 250M-2 3000 50 2 5642 4999 4488 4478 3968 3562
6314/C3
HMC3 250M-6 1000 50 6 9277 8215 7370 7363 6520 5850
HMC3 250M-4 1500 50 4 8105 7176 6438 6433 5696 5110
HMC3 250M-2 3000 50 2 6433 5696 5110 5106 4521 4056
280
6314/C3
HMC3 280M-6 1000 50 6 9284 8367 7614 7369 6641 6044
HMC3 280S-6 1000 50 6 9183 8205 7416 7289 6513 5886
HMC3 280M-4 1500 50 4 8110 7309 6652 6437 5801 5280
HMC3 280S-4 1500 50 4 8022 7168 6478 6367 5689 5142
HMC3 280M-2 3000 50 2 6437 5801 5280 5109 4604 4190
HMC3 280S-2 3000 50 2 6367 5689 5142 5054 4516 4081
6317/C3
HMC3 280M-6 1000 50 6 11751 10575 9613 9327 8394 7630
HMC3 280S-6 1000 50 6 11626 10371 9361 9227 8231 7430
HMC3 280M-4 1500 50 4 10266 9238 8398 8148 7333 6666
HMC3 280S-4 1500 50 4 10156 9060 8177 8061 7191 6490
HMC3 280M-2 3000 50 2 8148 7333 6666 6467 5820 5290
HMC3 280S-2 3000 50 2 8061 7191 6490 6398 5707 5151